Fiat C.R. 20 pursuit airplane
An NACA aircraft circular from 1927, issued by the National Advisory Committee for Aeronautics through the NASA Technical Reports Server, documenting a Fiat C.R. 20 pursuit airplane for aeronautical engineers and researchers. The pages are photographs captioned with framework and close-up views, with one rotated line drawing of a biplane seen from above, which suggests a designer could take the strong diagonal bracing and wing-strut geometry as structural pattern material.
